NSN 4820-00-083-1263 Repair Services

Safety Relief Valve Overhaul, Repair, and Maintenance

MPN: A90293, 128SCH136-1

Pricing and Lead Time Quote

Submit this form and receive an overhaul/repair pricing and lead time quote for NSN 4820-00-083-1263 safety relief valve
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NSN 4820000831263


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AS9120B:2015 ISO 9001 Audited and Certified

FAA and EASA Part 145 Certified Repair Stations Ensuring the highest standards of quality and compliance for our clients' needs.

We specialize in the repair and refurbishment of nsn components. From mechanical assemblies to rotor blades, our comprehensive capabilities cover a wide range of NSN parts, providing cost effective solutions to extend the operational life of vital equipment.

NSN 4820-00-083-1263 has been designated as a repairable item and has been included in our capabilities catalog. If you require overhaul or repair services use the form on this page to send us your information. We will provide you with a lead time and price quote.

Repairability and Datasheet

NSN 4820-00-083-1263 can be offered in repaired, serviceable, overhauled, or inspected conditions.
National Stock Number (NSN) 4820-00-083-1263
Categorization Safety or relief valves
Repairability Code

Approximate Weight 0.6lb
Thread Class 3b all ends
Thread Direction Right-hand all ends
Flow Control Device Disk
Bonnet Type Packing retaining
Disk Loading Method Spring
Valve Discharge Flow Rate 2.5 gallons per minute
Maximum Operating Temp 275.0 degrees fahrenheit single response
Connection Style Gasket sea (boss) all ends
Valve Operation Method Automatic
Connection Type Threaded internal tube all ends
Features Provided Pressure tight outlet side
Maximum Operating Pressure 4500.0 pounds per square inch single response
Thread Size 0.437 inches all ends
Opening Pressure Setting 3650.0 pounds per square inch
Outside Diameter Tube Accommodated 0.250 inches all ends
Material Stainless steel flow control device
Media For Which Designed Fuel/oil, hydrocarbon single response
Style Designator Straight thru
Thread Series Designator Unf all ends

Part Numbers

Part Number Company RNAAC (Repair Depot)
A90293 HYDRO-AIRE, INC. XX -
128SCH136-1 NORTHROP GRUMMAN SYSTEMS CORPORATION XX -